WO2019103369A2 - Procédé de fabrication de poudre de copolymère greffé - Google Patents

Procédé de fabrication de poudre de copolymère greffé Download PDF

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Publication number
WO2019103369A2
WO2019103369A2 PCT/KR2018/013629 KR2018013629W WO2019103369A2 WO 2019103369 A2 WO2019103369 A2 WO 2019103369A2 KR 2018013629 W KR2018013629 W KR 2018013629W WO 2019103369 A2 WO2019103369 A2 WO 2019103369A2
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WIPO (PCT)
Prior art keywords
graft copolymer
powder
weight
poly
oxyalkylene
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PCT/KR2018/013629
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English (en)
Korean (ko)
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WO2019103369A3 (fr
Inventor
이종주
최정수
이원석
이루다
김호훈
유근훈
장석구
박상후
옥혜정
심형섭
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주식회사 엘지화학
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Application filed by 주식회사 엘지화학 filed Critical 주식회사 엘지화학
Priority to EP18880958.6A priority Critical patent/EP3613782B1/fr
Priority to CN201880015924.5A priority patent/CN110382571B/zh
Priority to US16/619,435 priority patent/US11421103B2/en
Publication of WO2019103369A2 publication Critical patent/WO2019103369A2/fr
Publication of WO2019103369A3 publication Critical patent/WO2019103369A3/fr

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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/12—Polymerisation in non-solvents
    • C08F2/16—Aqueous medium
    • C08F2/22—Emulsion polymerisation
    • C08F2/24—Emulsion polymerisation with the aid of emulsifying agents
    • C08F2/26—Emulsion polymerisation with the aid of emulsifying agents anionic
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F2/00—Processes of polymerisation
    • C08F2/12—Polymerisation in non-solvents
    • C08F2/16—Aqueous medium
    • C08F2/22—Emulsion polymerisation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F279/00—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00
    • C08F279/02—Macromolecular compounds obtained by polymerising monomers on to polymers of monomers having two or more carbon-to-carbon double bonds as defined in group C08F36/00 on to polymers of conjugated dienes
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
    • C08F6/00—Post-polymerisation treatments
    • C08F6/14—Treatment of polymer emulsions
    • C08F6/22—Coagulation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J3/00—Processes of treating or compounding macromolecular substances
    • C08J3/12—Powdering or granulating
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L51/00—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers
    • C08L51/04—Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Compositions of derivatives of such polymers grafted on to rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2351/00—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers
    • C08J2351/04—Characterised by the use of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bonds; Derivatives of such polymers grafted on to rubbers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2471/00—Characterised by the use of polyethers obtained by reactions forming an ether link in the main chain; Derivatives of such polymers
    • C08J2471/02—Polyalkylene oxides

Definitions

  • the present invention relates to a process for producing a graft copolymer powder, and more particularly, to a process for producing a graft copolymer powder having improved anti-crystallization properties.
  • the caking of the graft copolymer powder is made by the bond between the graft copolymer powders, meaning that the free flowing powder solidifies. These solidification phenomena are caused by deformation and bonding of powders in various industrial fields such as detergents, food, fertilizers, medicines, and chemicals.
  • WO2015-030415A discloses a process for producing a transparent ABS copolymer.
  • the transparent ABS copolymer obtained by emulsion polymerization is in the form of a latex and is recovered in powder form through post-treatment such as coagulation, dehydration and drying.
  • post-treatment such as coagulation, dehydration and drying.
  • solidification phenomena of the transparent ABS copolymer powder occasionally occurred in the coagulation and dehydration process. If such a solidification phenomenon occurs, not only the efficiency of the graft copolymer production process is lowered but also the production equipment is deformed or broken.
  • An object of the present invention is to provide a process for producing a graft copolymer powder which can prevent the solidification phenomenon of the graft copolymer powder in the process for producing the graft copolymer powder.
  • the present invention provides a method for producing a graft copolymer latex, comprising the steps of: preparing a graft copolymer latex by emulsion polymerization of a conjugated diene polymer, an aromatic vinyl monomer and an alkyl (meth) acrylate monomer; Aggregating the graft copolymer latex; Aging the agglomerated graft copolymer; Dehydrating the aged graft copolymer to prepare a graft copolymer wet powder; And introducing poly (oxyalkylene) diglycolic acid into the graft copolymer wet powder.
  • the present invention also provides a method for producing the graft copolymer powder.
  • the wet graft copolymer powder can be coated with poly (oxyalkylene) diglycolic acid to prevent the solidification phenomenon of the wet powder of the graft copolymer. This makes it possible to minimize the deformation or breakdown of the manufacturing equipment in the production of the graft copolymer powder.
  • the process for preparing a graft copolymer powder comprises the steps of: 1. emulsion-polymerizing a conjugated diene polymer, an aromatic vinyl monomer and an alkyl (meth) acrylate monomer to prepare a graft copolymer latex ; 2. agglomerating the graft copolymer latex; 3. aging the agglomerated graft copolymer; 4. dehydrating the aged graft copolymer to prepare a graft copolymer wet powder; And 5. introducing poly (oxyalkylene) diglycolic acid into the graft copolymer wet powder.
  • the conjugated diene polymer, the aromatic vinyl monomer, and the alkyl (meth) acrylate monomer are subjected to emulsion polymerization.
  • the conjugated diene polymer may be a polymer prepared by polymerization of a conjugated diene monomer, and may be in the form of a latex in which the conjugated diene polymer is dispersed in water in a colloidal state.
  • the conjugated diene-based monomer may be at least one member selected from the group consisting of 1,3-butadiene, isoprene, chloroprene and piperylene, and 1,3-butadiene may be preferred.
  • the conjugated diene polymer may be produced by polymerizing the conjugated diene monomer together with at least one comonomer selected from the group consisting of aromatic vinyl monomers and vinyl cyan monomers.
  • the comonomer may be at least one member selected from the group consisting of aromatic vinyl monomers and vinyl cyan monomers, and may be at least one member selected from the group consisting of styrene and acrylonitrile.
  • the conjugated diene polymer is contained in an amount of 40 to 70% by weight, 45 to 65% by weight or 50 to 60% by weight based on the total weight of the conjugated diene polymer, the aromatic vinyl monomer and the alkyl (meth) acrylate monomer And 50 to 60% by weight thereof is preferably contained.
  • the impact resistance, workability, and transparency of the graft copolymer can be more excellent.
  • the polymerization stability can also be enhanced.
  • the content of the conjugated diene polymer may be based on the solid content.
  • the average particle diameter of the conjugated diene-based polymer may be 0.06 to 0.5 mu m, 0.08 to 0.45 mu m, and 0.08 to 0.32 mu m, preferably 0.1 to 0.3 mu m.
  • mechanical properties such as transparency and impact strength can be further improved.
  • the average particle diameter of the conjugated diene polymer can be measured using a dynamic light scattering method, and more specifically, it can be measured using a Nicomp 380 instrument (product name: PSS).
  • the average particle diameter may mean an arithmetic average particle diameter in a particle size distribution measured by a dynamic light scattering method, specifically, an average particle diameter of scattering intensity.
  • the aromatic vinyl-based monomer may be at least one member selected from the group consisting of styrene,? -Methylstyrene, and p-methylstyrene, of which styrene is preferable.
  • the aromatic vinyl monomer is contained in an amount of 5 to 25% by weight, 8 to 20% by weight or 10 to 15% by weight based on the total weight of the conjugated diene polymer, the aromatic vinyl monomer and the alkyl (meth) acrylate monomer , And it is preferable that 10 to 15% by weight thereof is included.
  • the transparency and workability of the graft copolymer as a final product can be improved.
  • the alkyl (meth) acrylate monomer may be at least one monomer selected from the group consisting of methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, decyl (Meth) acrylate, and among them, methyl methacrylate is preferable.
  • the alkyl (meth) acrylate monomer is used in an amount of 15 to 45 wt%, 20 to 40 wt%, or 25 to 35 wt%, based on the total weight of the conjugated diene polymer, the aromatic vinyl monomer, and the alkyl (meth) By weight, preferably 25 to 35% by weight.
  • the transparency and the mechanical properties of the graft copolymer as a final product can be improved.
  • the step of preparing the graft copolymer latex may further include a vinyl cyan monomer to emulsion polymerize.
  • the vinyl cyan monomer may be at least one member selected from the group consisting of acrylonitrile, methacrylonitrile, phenyl acrylonitrile, and? -Chloroacrylonitrile, and among these, acrylonitrile is preferable.
  • the vinyl cyan monomer is used in an amount of 0.1 to 10% by weight, 0.5 to 5% by weight, or 1 to 5% by weight based on the total weight of the conjugated diene polymer, aromatic vinyl monomer, alkyl (meth) acrylate monomer and vinyl cyan monomer 3% by weight, and preferably 1 to 3% by weight.
  • the yellowing due to the vinyl cyan monomer can be minimized, while the chemical resistance of the graft copolymer is improved.
  • the emulsion polymerization may be graft-emulsion polymerization, and may be performed at 50 to 85 ° C or 60 to 80 ° C, preferably 60 to 80 ° C.
  • the emulsion polymerization may be carried out in the presence of an initiator and an emulsifier.
  • the radical initiator may include inorganic peroxides such as sodium persulfate, potassium persulfate, ammonium persulfate, potassium persulfate, and hydrogen peroxide; t-butyl peroxide, cumene hydroperoxide, p-menthol hydroperoxide, di-t-butyl peroxide, t-butyl cumyl peroxide, acetyl peroxide, isobutyl peroxide, octanoyl peroxide, dibenzoyl peroxide Organic peroxides such as oxides, 3,5,5-trimethylhexanol peroxide, t-butyl peroxyisobutyrate; Azo compounds such as azobisisobutyronitrile, azobis-2,4-dimethylvaleronitrile, azobiscyclohexanecarbonitrile, and azobisisobutyric acid (butyl acid) methyl, Doubly cumen
  • the initiator may be added in an amount of 0.001 to 1.0 part by weight, 0.01 to 0.5 part by weight or 0.02 to 0.1 part by weight based on 100 parts by weight of the sum of the conjugated diene polymer, the aromatic vinyl monomer and the alkyl (meth) acrylate monomer And it is preferable that 0.02 to 0.1 part by weight of the total amount is added.
  • emulsion polymerization can be easily carried out, while the residual amount of the initiator in the graft copolymer powder can be minimized.
  • the activator may be at least one member selected from the group consisting of sodium formaldehyde sulfoxylate, sodium ethylenediaminetetraacetate, ferrous sulfate, dextrose, sodium pyrophosphate, sodium pyrophosphate unhyadiol, and sodium sulfate, Of these, at least one selected from the group consisting of sodium ethylenediamine tetraacetate, ferrous sulfate and sodium aldehyde sulfoxylate is preferable.
  • the activator is added in an amount of 0.001 to 0.5 parts by weight, 0.001 to 0.1 parts by weight or 0.001 to 0.08 parts by weight based on 100 parts by weight of the sum of the conjugated diene polymer, the aromatic vinyl monomer, and the alkyl (meth) acrylate monomer , And it is preferable to be added in an amount of 0.001 to 0.08 part by weight.
  • the emulsion polymerization can be performed more easily, while the residual amount of the activating agent in the graft copolymer powder can be minimized.
  • the emulsifier may be selected from the group consisting of sodium compounds of alkylbenzenesulfonates, potassium compounds of alkylbenzenesulfonates, potassium compounds of alkylcarboxylates, sodium compounds of alkylcarboxylates, potassium compounds of oleic acid, sodium compounds of oleic acid, sodium compounds of alkyl sulfates , Potassium compounds of alkyl sulphates, sodium compounds of alkyldicarboxylates, potassium compounds of alkyldicarboxylates, sodium compounds of alkyl ether sulfonates, potassium compounds of alkyl ether sulfonates, sodium compounds of alkyl ether sulphates, alkyl ethers A sodium compound of alkylbenzenesulfonate, sodium dodecylbenzenesulfonate, sodium dodecylbenzenesulfonate, sodium dodecylbenzenesulfonate, alkylbenzen
  • the emulsifier may be a commercially available material.
  • a commercially available substance may be used.
  • BC-10 of ADEKA, BC-10 of DAI-ICHI KOGYO SEIYAKU, BC-20 of DAI- ICHI KOGYO SEIYAKU, HS10 of DAI- ICHI of MITSUBISHI Hitenol KH10 of KOGYO SEIYAKU, and PD-104 of KAO CHEMICALS Co., Ltd. can be used.
  • the emulsifier may be added in an amount of 0.15 to 2.0 parts by weight, 0.3 to 1.5 parts by weight, or 0.5 to 1.2 parts by weight based on 100 parts by weight of the sum of the conjugated diene polymer, the aromatic vinyl monomer and the alkyl (meth) acrylate monomer , And 0.5 to 1.2 parts by weight of the total amount is preferably added.
  • emulsion polymerization can be easily carried out, while the residual amount of the initiator in the graft copolymer powder can be minimized.
  • a molecular weight control agent may be further added.
  • the molecular weight regulator may be at least one selected from the group consisting of t-dodecyl mercaptan, N-dodecyl mercaptan, and? -Methyl styrene dimer, and t-dodecyl mercaptan is preferable.
  • the molecular weight modifier is added in an amount of 0.1 to 1.0 parts by weight, 0.2 to 0.8 parts by weight or 0.4 to 0.6 parts by weight based on 100 parts by weight of the sum of the conjugated diene polymer, the aromatic vinyl monomer, and the alkyl (meth) acrylate monomer , And 0.4 to 0.6 parts by weight of the total amount is preferably added.
  • the emulsion polymerization may be carried out by introducing a monomer or the like into the reactor in a batch or by introducing a part of monomers or the like into the reactor before starting the emulsion polymerization and continuously introducing the remainder after the initiation, can do.
  • the graft copolymer latex is agglomerated.
  • the flocculant may be at least one selected from the group consisting of magnesium sulfate (MgSO 4 ), aluminum sulfate, calcium chloride, tartaric acid and citric acid, and calcium chloride .
  • the agglomerating step may be carried out at 93 to 97 ⁇ ⁇ , 94 to 96 ⁇ ⁇ or 93 to 95 ⁇ ⁇ , preferably 93 to 95 ⁇ ⁇ .
  • the coagulating step may be performed for 5 to 20 minutes, 7 to 20 minutes, or 10 to 20 minutes, preferably 10 to 20 minutes. When the above-mentioned range is satisfied, cohesion can be easily performed, and cohesion can be minimized.
  • the agglomerated graft copolymer is then aged.
  • the aging may be performed at 50 to 98 ⁇ , 80 to 98 ⁇ or 90 to 98 ⁇ , preferably 90 to 98 ⁇ .
  • the apparent specific gravity can be improved and the high-frequency phenomenon can be minimized.
  • the aging may be performed for 20 to 100 minutes, 20 to 60 minutes, or 20 to 30 minutes, preferably 20 to 30 minutes.
  • the apparent specific gravity is improved and the solidification phenomenon can be minimized.
  • the method for producing a graft copolymer powder according to an embodiment of the present invention may further comprise, after the aging, washing the aged graft copolymer with water.
  • the water is at a temperature of 15-20 DEG C and the graft copolymer agate is washed 1-3 times with water.
  • the aged graft copolymer is then dehydrated to prepare a graft copolymer wet powder.
  • the dehydration of the graft copolymer aged product can be carried out by using a dehydration apparatus, specifically, using a centrifugal dehydrator (trade name: WS-7000, manufactured by Hanil Electric).
  • the dehydration can be performed at room temperature.
  • the water content of the graft copolymer wet powder may be 10 to 40%, 15 to 35% or 20 to 30%, preferably 20 to 30%. When the above-mentioned range is satisfied, the solidification phenomenon of the graft copolymer wet powder can be minimized.
  • the moisture content can be measured by the following method.
  • Water content (%) (weight of graft copolymer wet powder (g) - weight of graft copolymer dry powder (g)) / (weight of graft copolymer wet powder (g))
  • the graft copolymer aged material was dehydrated in a centrifugal dehydrator (trade name: WS-7000, manufactured by Hanil Electric) at room temperature for 5 minutes
  • Graft Copolymer Dry Powder The graft copolymer wet powder was dissolved in a fluidized bed dryer (Full Capacity: 10 L, External Size (W x D x H, mm): 1400 x 750 x 1400, manufactured by Kanatec Co., Ltd.) Dried at 95 ° C for 120 minutes
  • poly (oxyalkylene) diglycolic acid is added to the wet powder of the graft copolymer.
  • a coating layer can be formed on the surface of the wet powder of the graft copolymer, thereby preventing binding and deformation of the wet powder of the graft copolymer, Can be minimized.
  • the poly (oxyalkylene) diglycolic acid may have a weight average molecular weight of 1,000 to 10,000 g / mol, 1,500 to 8,000 g / mol or 2,000 to 6,000 g / mol, and preferably 2,000 to 6,000 g / mol.
  • a weight average molecular weight 1,000 to 10,000 g / mol, 1,500 to 8,000 g / mol or 2,000 to 6,000 g / mol, and preferably 2,000 to 6,000 g / mol.
  • the weight average molecular weight can be determined by relative permeation to standard PS (standard polystyrene) samples through gel permeation chromatography using tetrahydrofuran as the eluent.
  • the poly (oxyalkylene) diglycolic acid may be poly (oxyethylene) diglycolic acid.
  • the poly (oxyalkylene) diglycolic acid may be contained in an amount of 0.1 to 5 parts by weight, 0.3 to 3 parts by weight or 0.5 to 2 parts by weight based on 100 parts by weight of the wet graft copolymer powder, .
  • the physical properties of the graft copolymer may not be affected while minimizing the solidification phenomenon of the wet powder of the graft copolymer.
  • the poly (oxyalkylene) diglycolic acid is preferably mixed with water so as to be easily mixed and coated with the graft copolymer wet powder while satisfying the above-mentioned contents.
  • the poly (oxyalkylene) diglycolic acid and water may be mixed in a weight ratio of 80:20 to 50:50, 75:25 to 50:50, or 70:30 to 50:50, and 70:30 to 50 : 50 by weight. When the above-mentioned range is satisfied, it can be more easily mixed and coated with the graft copolymer wet powder.
  • the method for preparing a graft copolymer powder according to an embodiment of the present invention may further include a step of adding a poly (oxyalkylene) diglycolic acid followed by drying.
  • the drying may be performed at 50 to 100 ° C, 55 to 95 ° C, or 60 to 90 ° C, preferably 60 to 90 ° C.
  • the solidification phenomenon of the dry powder of the graft copolymer can be minimized.
  • the drying may be performed at 90 to 240 minutes, 100 to 180 minutes, or 120 to 150 minutes, preferably 120 to 150 minutes.
  • the wet powder of the graft copolymer is sufficiently dried to minimize the solidification phenomenon of the dry powder of the graft copolymer.
  • the graft copolymer powder according to another embodiment of the present invention includes a graft copolymer formed by emulsion polymerization of a conjugated diene polymer, an aromatic vinyl monomer and an alkyl (meth) acrylate monomer, and a poly (oxyalkylene) di Glycolic acid-derived units.
  • the poly (oxyalkylene) diglycolic acid-derived unit may be placed in the form of a film on the graft copolymer powder.
  • the graft copolymer powder may have a decay rate of 70% or more, preferably 90% or more.
  • graft copolymer powder 20 g was charged into a cylindrical mold having an inner diameter of 50 mm and a height of 60 mm, a weight of 20 kg was added, and the mixture was stored at 60 ° C for 20 minutes to prepare a powder cake, Was placed on a sieve having a sieve size of 2 mm and a line thickness of 0.9 mm and vibrated at an amplitude of 0.5 mm at intervals of 2 minutes to measure the weight of the powder remaining per time, Weight can be calculated by converting the weight of the powder passed through the sieve into a percentage.
  • the agglomerated graft copolymer was aged at 50 ⁇ for 25 minutes and then washed and dehydrated at room temperature for 5 minutes with a centrifugal dehydrator (trade name: WS-7000, manufactured by Hanil Electric) to prepare a graft copolymer wet powder Respectively.
  • a centrifugal dehydrator trade name: WS-7000, manufactured by Hanil Electric
  • the agglomerated graft copolymer of Example 1 was aged at 90 ⁇ for 25 minutes and then washed and dehydrated by a centrifugal dehydrator (trade name: WS-7000, manufactured by Hanil Electric) at room temperature for 5 minutes to obtain a graft copolymer wet Powder.
  • a centrifugal dehydrator (trade name: WS-7000, manufactured by Hanil Electric) at room temperature for 5 minutes to obtain a graft copolymer wet Powder.
  • the graft copolymer wet powder of Example 1 was used as the graft copolymer powder.
  • the wet powder of the graft copolymer of Example 2 was used as the graft copolymer powder.
  • the coagulated graft copolymer of Example 1 was washed without aging and then dehydrated with a centrifugal dehydrator (trade name: WS-7000, manufactured by Hanil Electric) for 5 minutes to obtain a graft copolymer wet powder, Was used as a coalescent powder.
  • a centrifugal dehydrator (trade name: WS-7000, manufactured by Hanil Electric) for 5 minutes to obtain a graft copolymer wet powder, Was used as a coalescent powder.
  • the powder cake was placed on a sieve having a sieve size of 2 mm and a line thickness of 0.9 mm and vibrated at an amplitude of 0.5 mm at intervals of 2 minutes.
  • the weight of the powder remaining per hour was measured, and the weight of the graft copolymer powder passed through the sieve body of the charged graft copolymer powder was converted into a percentage. This percentage was defined as the rate of decay, and the results are shown in Table 1 below. Here, if the decay rate was 70% or more, the experiment was stopped considering that the powder cake completely disintegrated.
  • Example 1 it was confirmed that the solidification phenomenon was minimized in Example 1 and Example 2 because the disintegration rate was 70% or more even when the sifting was performed only once.
  • the decay rate was improved to 92.1% because the aging temperature was high. From these results, it was confirmed that hardening phenomenon hardly occurred.
  • a graft copolymer powder having excellent solidification prevention characteristics can be produced.

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Graft Or Block Polymers (AREA)

Abstract

La présente invention concerne un procédé de fabrication d'une poudre de copolymère greffé, le procédé comprenant les étapes : de polymérisation en émulsion d'un polymère de diène conjugué, d'un monomère de vinyle aromatique et d'un monomère de (méth)acrylate d'alkyle pour préparer un latex de copolymère greffé ; d'agglomération du latex de copolymère greffé ; de vieillissement du copolymère greffé aggloméré ; de déshydratation du copolymère greffé vieilli pour préparer une poudre humide de copolymère greffé ; et d'introduction d'acide poly(oxyalkylène) diglycolique dans la poudre humide de copolymère greffé.
PCT/KR2018/013629 2017-11-22 2018-11-09 Procédé de fabrication de poudre de copolymère greffé WO2019103369A2 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP18880958.6A EP3613782B1 (fr) 2017-11-22 2018-11-09 Procédé de fabrication de poudre de copolymère greffé
CN201880015924.5A CN110382571B (zh) 2017-11-22 2018-11-09 接枝共聚物粉末的制备方法
US16/619,435 US11421103B2 (en) 2017-11-22 2018-11-09 Method for preparing graft copolymer powder

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KR1020170156566A KR102185742B1 (ko) 2017-11-22 2017-11-22 그라프트 공중합체 분말의 제조방법
KR10-2017-0156566 2017-11-22

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WO2019103369A3 WO2019103369A3 (fr) 2019-07-18

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KR20230036455A (ko) 2021-09-07 2023-03-14 주식회사 엘지화학 그라프트 중합체 건조 분말의 제조방법
KR20230160521A (ko) 2022-05-17 2023-11-24 최해용 골프공 타격 장치

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WO2015030415A1 (fr) 2013-08-29 2015-03-05 (주) 엘지화학 Résine abs transparente et composition de résine abs transparente

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